Regular Expressions 101

Sponsors

Library entries

2
pcre

Extract Metadata

no description available
Submitted by kai_desu - 8 years ago
1
pcre

reference

reference pattern checking
Submitted by karthikeyan - 8 years ago
-2
pcre

regex demo

no description available
Submitted by anonymous - 8 years ago
1
pcre

tr

no description available
Submitted by anonymous - 8 years ago
0
pcre

UUID regex

no description available
Submitted by santisaez - 8 years ago
2
pcre

Route Regex

no description available
Submitted by anonymous - 8 years ago
1
pcre

VNC-58

no description available
Submitted by anonymous - 8 years ago
1
pcre

My test

My test
Submitted by Mike - 8 years ago
1
pcre

attributeselector

no description available
Submitted by anonymous - 8 years ago
0
pcre

only pixel set font-size

no description available
Submitted by amaroyche - 8 years ago
1
python

Find #'s

no description available
Submitted by anonymous - 8 years ago

match valid JSON

Vote

26

Regular Expression
pcre

/
(?(DEFINE) # Note that everything is atomic, JSON does not need backtracking if it's valid # and this prevents catastrophic backtracking (?<json>(?>\s*(?&object)\s*|\s*(?&array)\s*)) (?<object>(?>\{\s*(?>(?&pair)(?>\s*,\s*(?&pair))*)?\s*\})) (?<pair>(?>(?&STRING)\s*:\s*(?&value))) (?<array>(?>\[\s*(?>(?&value)(?>\s*,\s*(?&value))*)?\s*\])) (?<value>(?>true|false|null|(?&STRING)|(?&NUMBER)|(?&object)|(?&array))) (?<STRING>(?>"(?>\\(?>["\\\/bfnrt]|u[a-fA-F0-9]{4})|[^"\\\0-\x1F\x7F]+)*")) (?<NUMBER>(?>-?(?>0|[1-9][0-9]*)(?>\.[0-9]+)?(?>[eE][+-]?[0-9]+)?)) ) \A(?&json)\z
/
x

Description

Loading markdown...
Submitted by Mateon1 - 8 years ago